Improvement in kossfflg-maoeines



@uiten gisten gattini @fitta described, and for the purpose specified.

CHARLES CILPIN AND LAURENCE T. DICKINsoN, or CUMBEELAND,

MARYLAND.

Letters Patent No. 82,400, dated September 22, 1868.

IMPROVEMENT IN ROSSING-MAGHINES.

T0 ALL WHOM IT MAY CONCERN: l

Bo it known that we, CHARLES GILPIN and LAURENCE T. DICKINsoN, ofCumberland, in the county of A11eghany, and State of Maryland, haveinvented anew and improved Rossing-Machine; and we do hereby declarethat the following is a full, clear, and exact description of theconstruction and operation of the same, reference being had to theaccompanying drawings, making a part of this specication, in Which-Figure lisa side elevation, showing both ends of the machine, its centrebeing removed.

Figure 2 is a horizontal section through line :e :z: of g. 1.

This improvement consists in the employmentof a reciprocating saw,instead of a cutting-blade, to split the bark as it comes from therollers. A

In the drawings, A is the frame; B2 B3, the lower rollers; T, thefeed-table; a, an iron rod between the rollers, and connecting the endsof the frame; b2, the working-shaft; E, the gearing, and c the belting,which connect the rollers, and convey motion from one to the other, ofour improved rossing-mill. We will not describe these parts further, forthe reason that their 'construction and oihce are fully explained in anapplication for Letters Patent thereon tiled contemporaneously withthis.

rl'liis invention is an improvement upon said machine, consisting in theemployment of a vibrating saw, M, in place'of the-knife K, described inthe other application. The'knife is operated by a. lever, R, hingedtothe frame at r, and worked by .a cam, u, on a shaft, W, in the mannershown in the drawings. The end ofthe lever that runs in the cam-grooveon the shaft may be provided with friction-rollers,or a loose sleeve orcap, as shown at r', to diminish friction. A spring-bam'P, is employedat the opposite end of the frame, to give the saw the necessary tension.

The cum-shaft W hase` small pinion, w, on its oixter endl, which gearswith a large wheel, N, on` an idleshaft. `0n the inner end of thelatter'shaft is another small pinion, i, gearing with a large wheel, II,on the driving-shaft b2. The cam-shaft is thus rotated at great speed bythe motion of the driving-shaft.

The principal object in using the saw is to split oi the outer woodycrust of the bark when it is 'very hard and dry. When the berk is soft,the sharp-edged' knife will perhaps answer the purpose better, but whenitis hard, and very thick, there is a decided advantage in employing thesaw to cnt into it.

By having a vertical slot, s, in the lever, and connecting the end ofthe saw-pitman thereto by-a set-screw, or other adjustable fastening,the stroke of thesaw may be increased or decreased at pleasure.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. KThe arrangement of the reciprocating saw M with relation to therollers, substantially as described.

2. The combination of the saw M, pitman H, spring P, leverlt, and cam u,on shaft W, substantially as CHARLES GILPN,v LAURENCE fr. DICKINSON.

Witnesses:

JCIIN C. BRADY, JonN B. HUDSON.

